In 2008 Gmail launched the option for users to connect to the service via https – A way to protect the information exchanged between our browser and Google's servers by encrypting it.
Because secure connection can make Gmail a little slower (encrypted data travels the web slower than unencrypted data), the company believed that the best thing to do would be to let the user choose how they would like to. use the service.
The safety-to-speed relationship has begun to be studied by Google in recent months and they have come to the conclusion that activating the secure connection was the best way forward.
Thus, as of today, the connection via https will be automatic for all users. Those who already used the connection safely will not be affected by the change. But users who trust their connections and feel secure to disable access via https will still be able to do so by accessing the settings and checking the box. Do not always use https. In this case, only the login will be done with secure connection.
Gmail warns, however, that offline Gmail users may currently have problems with the change. For more information on this issue, the Gmail team made this text available, which is available in English only.